bader22 - Free Online Quiz Maker

Q1 Score: 2.04

a- ThehelicalstructureofDNAhasamajor(wide)groove&a minor (narrow)groove.

b- Regulatoryproteinsbindtothemajor&minorgrooves, regulating DNA & RNA synthesis.

c- Separation of the two DNA strands from each other occurs at high temperature & is called reannealing.

d- Themeltingtemperature(Tm)isthetemperatureatwhichhalf of the helical structure of DNA is lost.

Q2 Score: 2.04

a- Theindividualstrandsarenothelical

b- Hydrogenbondsformbetweenpurine&pyrimidinebaseon the samestrand.

c- Adenine on one strand is hydrogen bonded to thymine on the opposite strand

d- Phosphodiesterbondsareorientedtowardtheinteriorofthe helix

Q5 Score: 2.04

a- A nitrogen base & ribose.

b- A nitrogen base , a pentose & phosphate.

c- A nitrogen base & phosphate

d- Any of the above

Q6 Score: 2.04

a- A nucleoside phosphate

b- Ribose diphosphate

c- A nucleoside minus phosphate

d- A hydrolytic product of nucleosides

Q7 Score: 2.04

a- Buildingunitsofnucleicacids

b- Sources of highenergy

c- Second messengers

d- Structuralcomponentsofmembranes

Q8 Score: 2.04

a- dehydrated,carbon3.

b- Oxygenated,carbon2.

c- Oxygenated,carbon3.

d- Deoxygenate,carbon2

Q9 Score: 2.04

a- A=3100 , T=2600 , C=2600 , G=3100.

b- A=3000 , T=2200 , C=3400 , G=3200.

c- A=2600 , T=2600 , C=3300 , G=3300.

d- A=3300 , T=3300 , C=2600 , G=2600.

Q10 Score: 2.04

a- 2'-hydroxylofonenucleotideto3'-hydroxylofthe ABCDE 1 2 3 4 5 6 Yourscore:.../6 6- following

b- 3'-hydroxylofonenucleotideto3'-hydroxylofthefollowing.

3'-hydroxyl of one nucleotide to 5'-hydroxyl of the following.

d- 5'-hydroxylofonenucleotideto5'-hydroxylofthe following.

Q11 Score: 2.04

a- Deoxyuridylate

b- Deoxyguanylate

c- Deoxyadenylate

d- Deoxycytidylate

Q12 Score: 2.04

a- Adenine equals thymine

b- Adenine equalsuracil

c- Guanine equals adenine.

d- Cytosineequalsthymine

Q13 Score: 2.04

a- DNAisformedoftwobranchedpolydeoxyribonucleotide chains

b- DNAissynthesizedbypolymerizationofdeoxynucleotides

c- DNAispresentinthenucleusandthemitochondria

d- BacterialDNAispresentinthesinglechromosome&the plasmids.

Q15 Score: 2.04

a- Pyrimidine + pentose + phosphate.

b- Purine + pentose + phosphate.

c- Purine or pyrimidine + pentose.

d- Purine or pyrimidine + phosphate

Q16 Score: 2.04

a- Poly-nucleoside

b- Poly-nucleotide

c- Either (a) or (b).

d- Neither (a) nor. (b)

Q17 Score: 2.04

a- Deoxynucleic acid.

b- Deoxyribonucleic acid.

c- Deoxyribodeoxynucleic acid

d- Dioxyribonucleic acid

Q21 Score: 2.04

a- Atriple-strandstructure

b- TheDNAstrandsrunninginoppositedirections

c- BasepairingbetweenbasesA&G.

d- Covalent bonding between bases.

Q22 Score: 2.04

a- DNAisdoublestrandedwhileRNAisabsolutelysingle stranded

b- DNAisresponsibleforstoringgeneticinformation&their transfer to daughter cells.

c- RNA is responsible for expressing the genetic information in the form of protein molecules.

d- DNAislocatedinthecellnuclei,whileRNAislocatedonlyin the cytoplasm

Q23 Score: 2.04

a- Hydrogenbond

b- Phosphodiester bonds.

c- Glycosidicbonds

d- all theabove

Q26 Score: 2.04

a- Phosphoric acid.

b- Pentoses

c- Adenosine

d- Cytosine

Q27 Score: 2.04

a- A nucleoside

b- A nucleotide

c- A purine ring.

d- A pyrimidine ring

Q28 Score: 2.04

a- N-glycosidic linkage

b- Peptide bond

c- Phospho diester bond

d- Hydrogen bond.

Q29 Score: 2.04

a- ContainscovalentlylinkedRNA&DNA.

b- ContainsacoreoftwoeachofhistonesH2A,H2B,H3&H4.

c- Requireaspecificbasesequenceforformation

d- ContainacoreoftwoeachofhistonesH1,H2,&H5.

Q30 Score: 2.04

a- DNA ispolydeoxynucleotide

DNAexistsasadoublehelixoftwocomplementaryanti- parallel strands

c- Thymidylate is a distinctive component of D

DNAhas3'-endsononeside,&two5'-endsontheotherside.

Q31 Score: 2.04

a- DNAisfoundassociatedwithproteins,formingnucleoprotein.

b- The5'-endofonestrandofDNAisbase-pairedwiththe3'-end of the other strand.

c- Phosphodiester bonds are heat resistant , but can be cleaved by nuclease enzymes.

d- DenaturationofDNAresultsfromdisruptionofphosphodiester bonds

Q32 Score: 2.04

a- A&TrichDNAdenaturesatalowertemperaturethanG&C rich DNA

b- Denaturationcausesanincreaseinabsorbanceat260nmofa DNA solution

c- Both (a) & (b).

d- Neither(a)nor(b).

Q33 Score: 2.04

a- Adenine + guanine.

b- Cytosine+thymine.

c- Adenine +thymine.

d- Cytosine+guanine

Q35 Score: 2.04

a- Adenine & cytosine.

b- Guanine & thymine.

c- Adenine & guanine.

d- Thymine & uracil.

Q36 Score: 2.04

a- Hasfewerbasepairs/turnthanBDNA helix.

b- Is permanent conformation of DNA.

c- HasahighcontentofCGsequence

d- Right handed double helix.

Q37 Score: 2.04

a- Deoxyguanylate&deoxycytidylateareattachedtoeachother by two hydrogen bonds.

Threehydrogenbondsexistbetweendeoxyadenylate

c- The A-T attraction is about 50% stronger than the C-G attraction

d- Noneoftheaboveistrue

Q38 Score: 2.04

a- Ribose

b- 2'-deoxyribose

c- 5'-deoxyribose

d- Any of the above.

Q39 Score: 2.04

a- Appearanceofthemajor&minorgrooves.

b- Thickness of the helix

c- Polarity of the strands.

d- Numberofbasepairs/turn.

Q40 Score: 2.04

a- 5'GTTCCCAA-3'.

b- 5'TTGGGAAC-3'.

c- 3'TTGGGAAC-5'.

d- 3'-GTTCCCAA-5'.

Q43 Score: 2.04

a- Hydrophobic interactions

b- Phosphodiester bond.

c- Vanderwaalsforce

d- Hydrogen bond.

Q44 Score: 2.04

a- Cleavage of the phosphodiester bonds.

b- The formation of triple helix.

c- A decrease in light absorption at 260 nm.

d- Thedenaturatedtemperatureisdirectlyrelatedwiththeguanine & cytosine contents.

Q45 Score: 2.04

a- histones Pts. (proteins)

b- non-histones Pts.

c- both a & b.

d- neither a nor b

Q47 Score: 2.04

1- The two nucleotide strands are held together by hydrogen

The number of thymidylate subunits should equal the number of deoxycytidylatesubunits

The number of deoxyadenylate subunits is essentially equal to the number of deoxyguanylate subunits

All the above is true.

Q48 Score: 2.04

a- IsregulatoryrepeatingstructureofDNA&histonesproteins.

b- HasacoreofDNAwithproteinswrappedaroundtheoutside

c- Usesonlyonetypeofhistonespernucleosome

d- Is separated from a second nucleosome by non-histone protein.

Q49 Score: 2.04

a- Thetwoendsarestructureequivalent

b- Themonomericunitsjoinedtogetherbyphosphodiester bonds

c- There are at least 20 different monomers that can be used.

d- Themonomericunitsarenotseparatedbyhydrolysis